Electrical measuring instrument having detachable current clamp

• US 7,312,603 B2
• Filed: 05/25/2007
• Issued: 12/25/2007
• Est. Priority Date: 04/27/2006
• Status: Active Grant

• Current Assignee: Fluke Corporation (Fortive Corp.)
• Original Assignee: Fluke Corporation (Fortive Corp.)
• Inventors: Luo, Shounan, Yong, Wang
• Primary Examiner(s): PATEL, PARESH H
• Application Number:
  US11/753,852
• Publication Number:
  US 20070252578A1
• Time in Patent Office: 214 Days
• Field of Search: None
• US Class Current: 324/127
• CPC Class Codes: G01R 1/04 Housings; Supporting members; Arrangements of terminals
• CPC Class Codes: G01R 1/06788 Hand-held or hand-manipulated probes, e.g. for oscilloscopes or for portable test instruments end pieces terminating in a probe H01R11/18
• CPC Class Codes: G01R 1/22 Tong testers acting as secondary windings of current transformers
• CPC Class Codes: G01R 15/18 using inductive devices, e.g. transformers

Abstract

A current clamp meter having a current meter body and a detachable current clamp. The current meter body and the current clamp are configured so that the current clamp is detachable from the current meter body and the meter is operable with the current clamp either attached to the current meter body or detached from the current meter body.

Claims

1. A current clamp meter, comprising:

a current meter body and a current clamp, the current meter body including circuits operable to calculate a current measurement from an input signal and the current clamp electrically coupled to the circuits included in the current meter body to sense a current and provide the input signal, the current meter body and the current clamp configured to have the current clamp detachable from the current meter body and operable with the current clamp either attached to the current meter body or detached from the current meter body.

2. The current clamp meter of claim 1 wherein the current meter body comprises first and second clamp retention members defining a region therebetween in which the current clamp is positioned when attached to the current meter body.

3. The current clamp meter of claim 2 wherein the first and second clamp retention members are configured to engage a portion of the attached current clamp.

4. The current clamp meter of claim 2 wherein the first and second clamp retention members have respective cutouts exposing a lever portion of the current clamp.

5. The current claim meter of claim 2 wherein the first and second clamp retention members each have a respective ridge formed thereon at a predetermined distance from an opening of the current clamp when the current clamp is attached to the current meter body.

6. The current clamp meter of claim 1 wherein the current clamp is electrically coupled to the circuits by a wire and the current meter body is further configured to provide a portion around which the wire can be wound.

7. The current clamp meter of claim 6 wherein the portion of the current meter body around which the wire is wound includes at least one recess in which the wire is received when wound.

8. The current clamp meter of claim 1 wherein the circuits included in the current meter body comprise a signal conditioning circuit configured to receive the input signal and a processor operable to calculate the current measurement.